处理循环引用, 解决环路问题

对于引用中的循环引用, 采用如下方式解决

    HashSet<String> alreadyCal = new HashSet<String>(); //递归计算时,记录那些已经计算过了
    HashSet<String> calculating = new HashSet<String>(); //递归计算时,记录那些正在计算的

    private void getFatherCategorys(String type) {
        HashSet<String> myType = (HashSet<String>) InheritType.get(type);
        HashSet<String> directFatherClone = (HashSet<String>) myType.clone();
        if (alreadyCal.contains(type)) {//已经计算这个类型
            return;
        }
        calculating.add(type);
        for (String father : directFatherClone) {
            if (alreadyCal.contains(father)) {
                myType.addAll(InheritType.get(father));
                continue;
            } else if (calculating.contains(father)) {//正在被计算
                continue;
            } else{
                getFatherCategorys(father);
                myType.addAll(InheritType.get(father));
            }
        }
        alreadyCal.add(type);
        calculating.remove(type);
    }